Bunk for logging-trucks



(No Model) .G.D.MATH ENY. BUNK FOR LOGGING TRUCKS Patented'Jahx 23, 1894.

Fig. 5.

' UNITED STATES PATENT OFFICE.

CIOERO D. MATHENY, OF SEATTLE, WASHINGTON.

BUNK FOR LOGGING-TRUCKS.

SPECIFICATION forming part of Letters Patent No. 513,124, dated January 23, 1894.

Application filed April 22, 1893. Serial No. 471,499. (No model.)

To all whom it may concern- Be it known that I, OIOERO D. MATHENY, a citizen of the United States, residing at Seattle, in the county of King and State of \V'ashington,have invented certain new and useful Improvements in Bunks for Logging-Trucks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such'as will enable others skilled in the art to which it appertains to make and use the same. 7

My invention consists of anew and improved form of bunk for logging trucks.

The object is to provide a bunk which may be convenient to load, will hold the logs securely both against rolling off and sliding thereon, and maybe easily and safely unloaded. This is secured by the means described in the specification hereinafter, reference being had to the accompanying drawings in which- Figure 1 is a side elevation of a truck, having my improved bunk thereon which is itself shown in end elevation. Fig. 2 is an end elevation of the truck and side elevation of the bunk. Fig. 3 is a plan view of the bunk alone, a small section being removed in the center. Fig. 4 is a section through one end of the-bunk to illustrate the method of dropping the chock block; Fig. 5 is an end elevation of the bunk showing the manner in which the angle plates or dogs engage with the under sides of the logs-t0 prevent sliding thereof. Fig. 6 is a perspective view of a chock block.

Upon the top of a truck frame, which may be of any common form, is mounted centrally the socket plate P, which has a spherical concavity in its upper surface. Fitting within this is the spherical projection P, upon the bearing plate fixed to the under side of the bunk or bolster A. In this waya ball and socket joint is formed which permits the bunk to rock in any direction.

To prevent the bunk from lifting out of its socket plate and to limit the amount of its rocking sidewise, a flat bar or strap H, is attached at each end to the truck frame and passes through a.hole near the upper edge of the bunk. This holds the bunk down upon the truck frame. A pin H, passes centrally down into the bunk and through a slot in the will slide endwise off of the truck.

contact at a time.

Attached to each side of the bunk are the angle plates or dogs D. These consist of plates which have their upper portions projecting outward at an angle and rising just to the level of the top of the bunk.

In using logging trucks of this kind it is customary to. have the logs loaded on two trucks which are separated a variable distance according to the length of the logs, the logs themselves acting as the connection through which the pull of the locomotive is communicated. This necessitates that the logs shall be firmly held on each truck or they This is ordinarily-done by using chains to bind them securely. With my truck this is accomplished by the use of the plates D, and the rocking motion of the bunk. When a pull is brought upon the logs the bunk rocks, which elevates the upper sharp edge of one of the plates above the top of the bunk where itengages with the under surface of the logs digging into them and holding them firmly. This is illustrated in Fig. 6 where the line M is the line of the top of the bunk.

To hold the logs from rolling off sidewise I use chock blocks 0, or cheese blocks as they are sometimes called. These are adj ustable to diiferent positions onthe bunk and may he dropped down level with the top of the bunk so that the logs may roll ofi unhindered.

' Set into each end of the bunk are the cast iron blocks B. These blocks havea T groove or slot b, connecting with its upper surface and a similar T slot 1), opening downwardly,

a web separating the two. This web has, beginning at its outer'end a series of holes 15, t, which connect the two T slots.

The check block 0, consists of a square bar of iron having pins 0, c, at one end and near the other end a curved portion 0'. The end having the pins, 0, c, enters the T slot, the pins preventing that end from rising therefrom. The body of the block is just wide enough to enter the slot. Near the outer end a curved strut or brace 0', projects downward into the slot. This is curved to circles having their centers in the pin c The lower T slot b, has a plate S, sliding therein. This plate has a series of holes which when properly placed will register with the holes in the web. In the position shown in Fig. 4 the lower end of the brace O, rests in a hole 25, n the web and is prevented from falling down into the groove A, by the plate S. If the plate is moved outward until the first hole registers with the hole containing the brace it will drop down to the position shown in the dotted lines at 0 This will leave the upper surface of the chock block flush with the upper surface of the bunk and the logs will roll ofif unrestrained.

The plate S, is slid in its groove by the following mechanism: A lever L is pivoted n a mortise in the bunk and is attached at its inner end to the plate S. To its outerend is attached the rod L, which is, at its opposite end attached to the hand lever L. This hand lever normally lies alongside the bunk where it is held by a hook Z. When pulled out to the position shown at the left in Fig. 3 the chock block on the opposite side is dropped. This places the operator on the opposite side of the cars from that on which the logs are dumped where there is no danger. As the cars at the dump are run upon a track having one rail elevated this insures the unloading of the cars. The chock block 0, may be moved along in its slot to occupy any one of the holes 15, as may be necessary to accommodate it to difierences in the logs.

Having thus described myinvention, what I claim, and desire to secure by Letters Patent, is

1. In a bunk for a logging truck, the combination with the beam A, for supporting the logs, means for mounting it upon the truck so that it may rock backward and forward a limited amount, of angle plates attached to the sides of the beam and having their upper portions projecting out therefrom at an angle and with their upper edges on a line with theupper surface of the bunk, substantially as shown and described.

2. In a bunk for a logging truck, the combination with the beam A, a ball and socket support for the same at its center, curved bearing blocks near the ends, a strap H, connected at each end of the truck, a slottherein at its center and a pin passing therethrough and into the bunk, of a metal plate fixed to each side of the bunk having its upper por tion projecting outward therefrom at an angle and on a line with its upper surface, substantially as shown and described.

3. In a bunk for a logging truck the combination with the beam A, forsupporting the logs, and a chock-block C, at each end thereof, of an apertured slide supporting the block in its raised position operated bya leverfrom the side of the truck to bring an aperture of the slide into register with a portion of the block whereby the chock-block may drop down within the body of the bunk, substantially as shown and described.

4. In a bunk for a logging truck the combination with the beam A, of the block B at the end thereof, said block having a T slot in the upper surface and a similar T slot in.

its under surface with aweb between, a series of holes in said web, a plate movable in the lower T slot and having a similar series of holes therein, of a chock-block consisting of a straight bar having projections on the opposite sides at one end to fit the upper T slot, and a curved arm near the outer end of said bar and resting in one of the holes of the web and upon the sliding plate, and means for moving said plate so that the curved arm of the chock-block will drop down through the hole therein, substantially as shown and described.

5. In a bunk for a logging truck the combination with the beam A, of the block b at the end thereof, said block having a T slotin itsunder surface with a web between, a series of holes in said web, a plate movable in the lower T slot and having a similar series of holes therein, of a chock-block consisting of a straight bar having projections on opposite sides at one end to fit in the upper T slot, and a curved arm near the outer end of said bar and resting in one of the holes of the web and upon the sliding plate, and means consisting of a lever pivoted on the bunk and to the sliding plate, a lever at the opposite end of the bunk, and a rod connecting the two levers, whereby the sliding plate may be moved so that the curved arm of the chock-block will drop down through a hole therein, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

CIGERO D. MATHENY.

Witnesses:

L. H. WHEELER, H. L. REYNOLDS.

IIO 

